<?php

/**
 * Field handler to provide simple renderer that allows linking to a node.
 */
class views_handler_field_search_score extends views_handler_field_numeric {

    function option_definition() {
        $options = parent::option_definition();

        $options['alternate_sort'] = array('default' => '');
        $options['alternate_order'] = array('default' => 'asc');

        return $options;
    }

    function options_form(&$form, &$form_state) {
        $style_options = $this->view->display_handler->get_option('style_options');
        if (isset($style_options['default']) && $style_options['default'] == $this->options['id']) {
            $handlers = $this->view->display_handler->get_handlers('field');
            $options = array('' => t('No alternate'));
            foreach ($handlers as $id => $handler) {
                $options[$id] = $handler->ui_name();
            }

            $form['alternate_sort'] = array(
                '#type' => 'select',
                '#title' => t('Alternative sort'),
                '#description' => t('Pick an alternative default table sort field to use when the search score field is unavailable.'),
                '#options' => $options,
                '#default_value' => $this->options['alternate_sort'],
            );

            $form['alternate_order'] = array(
                '#type' => 'select',
                '#title' => t('Alternate sort order'),
                '#options' => array('asc' => t('Ascending'), 'desc' => t('Descending')),
                '#default_value' => $this->options['alternate_order'],
            );
        }

        parent::options_form($form, $form_state);
    }

    function query() {
        // Check to see if the search filter added 'score' to the table.
        // Our filter stores it as $handler->search_score -- and we also
        // need to check its relationship to make sure that we're using the same
        // one or obviously this won't work.
        foreach ($this->view->filter as $handler) {
            if (isset($handler->search_score) && $handler->relationship == $this->relationship) {
                $this->field_alias = $handler->search_score;
                $this->table_alias = $handler->table_alias;
                return;
            }
        }

        // Hide this field if no search filter is in place.
        $this->options['exclude'] = TRUE;
        if (!empty($this->options['alternate_sort'])) {
            if (isset($this->view->style_plugin->options['default']) && $this->view->style_plugin->options['default'] == $this->options['id']) {
                // Since the style handler initiates fields, we plug these values right into the active handler.
                $this->view->style_plugin->options['default'] = $this->options['alternate_sort'];
                $this->view->style_plugin->options['order'] = $this->options['alternate_order'];
            }
        }
    }

    function click_sort($order) {
        if (isset($this->table_alias)) {
            $this->query->add_orderby(NULL, NULL, $order, $this->field_alias);
        }
    }

    function render($values) {
        // Only render if we exist.
        if (isset($this->table_alias)) {
            return parent::render($values);
        }
    }

}
